qcom: Add userspace tools to talk to dsp and modem

cherry-picked from upstream device/linaro/dragonboard project.

Add Qcom userspace tools and their respective sepolicy rules.

Userspace tools are downloaded from following github:

To trigger loading of wlan firmware on SDM845
git clone https://github.com/andersson/pd-mapper

Userspace reference for net/qrtr in the Linux kernel
git clone https://github.com/andersson/qrtr

Qualcomm Remote Filesystem Service Implementation
git clone https://github.com/andersson/rmtfs

Trivial File Transfer Protocol server over AF_QIPCRTR
git clone https://github.com/andersson/tqftpserv

Change-Id: Ic466af6fef010a9b71c90e38205f49a876b001e2
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Amit Pundir <pundiramit@gmail.com>
diff --git a/qcom/rmtfs/util.h b/qcom/rmtfs/util.h
new file mode 100644
index 0000000..3a9ec3e
--- /dev/null
+++ b/qcom/rmtfs/util.h
@@ -0,0 +1,9 @@
+#ifndef __UTIL_H__
+#define __UTIL_H__
+
+#define MIN(x, y) ((x) < (y) ? (x) : (y))
+#define MAX(x, y) ((x) > (y) ? (x) : (y))
+
+void print_hex_dump(const char *prefix, const void *buf, size_t len);
+
+#endif